New concept for the measurement of energetic neutral atom composition and the imaging of their sources

Details New concept for the measurement of energetic neutral atom composition and the imaging of their sources New concept for the measurement of energetic neutral atom composition and the imaging of their sources

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..598..291k&link_type=abstract

SOLAR AND GALACTIC COMPOSITION: A Joint SOHO/ACE Workshop. AIP Conference Proceedings, Volume 598, pp. 291-296 (2001).

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Gravitational Radiation Detectors, Mass Spectrometers, And Other Instrumentation And Techniques, Physical Properties

Scientific paper

Enrgetic neutral atoms created by charge neutralization of ions convey information about the region from which they originate. Free of magnetic and electric fields the neutrals travel in straight lines and can be observed far from their source. The neutrals provide the means for imaging planetary magnetospheres and studying the interstellar gas and the neutral solar wind. Neutral atoms with energies above a few keV can be observed with instruments that are largely modifications of devices already designed to detect ions. For neutrals with lower energies, other techniques are required. We present a new concept for detecting and imaging neutral atoms below 1 keV energy that has the potential for improving detection efficiency and resolution by a factor of ten over existing methods. The proposed instrument will use an excited-atom electron-attachment cell for high neutral to ion conversion efficiency. A novel method to contain the gas but allow incident neutral atoms and converted ions to pass into and out of the cell with high efficiency is presented. Applications of the detector are discussed. .

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